It could be a Cryptocoryne, maybe a narrow-leaf blassii or maybe wendtii, but the growth pattern looks wrong. I think that it is Purple waffle, Hemigraphis exotica, which is not an aquatic plant but is sometimes sold as one. The leaves look narrower than the one on plantgeek, but very similar to ones in a quick google image search. It may live for a while but will not thrive and will die in a few months. Bummer.
Where did you buy it at? I know Petco sells a lot of non-aquatics in plastic tubes.